prEN ISO 182-3
(Main)Plastics - Determination of the tendency of compounds and products based on vinyl chloride homopolymers and copolymers to evolve hydrogen chloride and any other acidic products at elevated temperatures - Part 3: Conductometric method (ISO/DIS 182-3:2022)
Plastics - Determination of the tendency of compounds and products based on vinyl chloride homopolymers and copolymers to evolve hydrogen chloride and any other acidic products at elevated temperatures - Part 3: Conductometric method (ISO/DIS 182-3:2022)
The principle of the method is maintaining a test portion of the PVC at an agreed temperature in a nitrogen gas stream, absorbing the hydrogen chloride evolved in a given amount of demineralized water, and potentiometrically determining the amount of hydrogen chloride evolved in relation to the recorded change in conductivity of the water. The method is recommended for compounded PVC materials and products only, although it can be used for polymers in powder form under appropriate conditions.
Kunststoffe - Bestimmung der Neigung von Formmassen und Erzeugnissen auf der Basis von Vinylchlorid-Homopolymeren und -Copolymeren, bei erhöhten Temperaturen Chlorwasserstoff und andere saure Produkte abzugeben - Teil 3: Leitfähigkeitsverfahren (ISO/DIS 182-3:2022)
Plastiques - Détermination de la tendance des compositions et produits à base d’homopolymères et de copolymères du chlorure de vinyle à dégager du chlorure d’hydrogène et éventuellement d’autres produits acides à températures élevées - Partie 3: Méthode conductimétrique (ISO/DIS 182-3:2022)
Polimerni materiali - Ugotavljanje tendence zmesi in proizvodov na osnovi homo- in kopolimerov vinilklorida, da pri povišanih temperaturah sproščajo klorovodik ali druge kisle produkte - 3. del: Konduktometrijska metoda (ISO/DIS 182-3:2022)
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Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN ISO 182-3:2022
01-september-2022
Polimerni materiali - Ugotavljanje tendence zmesi in proizvodov na osnovi homo-
in kopolimerov vinilklorida, da pri povišanih temperaturah sproščajo klorovodik ali
druge kisle produkte - 3. del: Konduktometrijska metoda (ISO/DIS 182-3:2022)
Plastics - Determination of the tendency of compounds and products based on vinyl
chloride homopolymers and copolymers to evolve hydrogen chloride and any other
acidic products at elevated temperatures - Part 3: Conductometric method (ISO/DIS 182-
3:2022)
Kunststoffe - Bestimmung der Neigung von Formmassen und Erzeugnissen auf der
Basis von Vinylchlorid-Homopolymeren und -Copolymeren, bei erhöhten Temperaturen
Chlorwasserstoff und andere saure Produkte abzugeben - Teil 3: Leitfähigkeitsverfahren
(ISO/DIS 182-3:2022)
Plastiques - Détermination de la tendance des compositions et produits à base
d’homopolymères et de copolymères du chlorure de vinyle à dégager du chlorure
d’hydrogène et éventuellement d’autres produits acides à températures élevées - Partie
3: Méthode conductimétrique (ISO/DIS 182-3:2022)
Ta slovenski standard je istoveten z: prEN ISO 182-3
ICS:
83.080.20 Plastomeri Thermoplastic materials
oSIST prEN ISO 182-3:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 182-3:2022
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oSIST prEN ISO 182-3:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 182-3
ISO/TC 61/SC 9 Secretariat: KATS
Voting begins on: Voting terminates on:
2022-06-09 2022-09-01
Plastics — Determination of the tendency of compounds
and products based on vinyl chloride homopolymers and
copolymers to evolve hydrogen chloride and any other
acidic products at elevated temperatures —
Part 3:
Conductometric method
Plastiques — Détermination de la tendance des compositions à base d'homopolymères et copolymères
du chlorure de vinyle à dégager du chlorure d'hydrogène et éventuellement d'autres produits acides à
températures élevées —
Partie 3: Méthode conductimétrique
ICS: 83.080.20
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
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USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 182-3:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022
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oSIST prEN ISO 182-3:2022
ISO/DIS 182-3:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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© ISO 2022 – All rights reserved
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oSIST prEN ISO 182-3:2022
ISO/DIS 182-3:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principle . 2
5 Reagents . 2
6 Apparatus . 2
7 Preparation of test samples .7
7.1 PVC plastisols . . 7
7.2 PVC pellets, extrudates, mouldings, thick sheet, etc. . 7
7.3 PVC film and sheet . 7
7.4 PVC coatings . 7
7.5 Cable and conductor insulation or sheating . 7
8 Number of tests . 7
9 Temperatures for dehydrochlorination . 7
10 Test procedure .8
10.1 Preparation of test portion . 8
10.2 Preliminary operations . 8
10.3 Special precautions when using dehydrochlorination cell A . 8
10.4 Preparation of the measurement cell . 8
10.5 Decomposition of the test portion . 9
11 Expression of results . 9
12 Test report . 9
13 Precision . 9
13.1 Introduction . 9
13.2 Repeatability . 10
13.3 Reproducibility . 10
13.4 Comparison with the pH-meter method (ISO 182-2) . 10
13.5 Factors affecting the stability time . 10
13.6 Conclusions . 12
Annex A (informative) Cleaning of the apparatus .13
Annex B (informative) Calculation of repeatability and reproducibility — Conductometric
and pH-meter methods . .14
Annex C (informative) Round robin test .16
Bibliography .18
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oSIST prEN ISO 182-3:2022
ISO/DIS 182-3:2022(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9,
Thermoplastic materials.
This second edition cancels and replaces the first edition (ISO 182-3:1993), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— adding the use of alternative heating baths such as metal blocks
A list of all parts in the ISO 182 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
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oSIST prEN ISO 182-3:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 182-3:2022(E)
Plastics — Determination of the tendency of compounds
and products based on vinyl chloride homopolymers and
copolymers to evolve hydrogen chloride and any other
acidic products at elevated temperatures —
Part 3:
Conductometric method
WARNING — The use of this part of ISO 182 may involve hazardous materials, operations and
equipment. This part of ISO 182 does not purport to address all of the safety problems associated
with its use. It is the responsibility of the user of this part of ISO 182 to establish appropriate
safety and health practices and determine the applicability of regulatory limitations prior to
use.
1 Scope
1.1 This document specifies a method for the determination of the thermal stability at elevated
temperature of compounds and products based on vinyl chloride homopolymers and copolymers (in
the following text abbreviated as PVC) which undergo dehydrochlorination (the evolution of hydrogen
chloride).
1.2 This document is applicable to the characterization of PVC compounds and products, especially
with regard to the effectiveness of their heat-stabilizing systems.
It is applicable to coloured PVC compounds and products where a discolouration test under the action
of heat may be unsatisfactory.
1.3 This document is applicable to compounded PVC materials and products. It can be applicable
to polymers in powder form under appropriate conditions, to be agreed upon between the interested
parties.
This document does not apply to PVC compounds in the form of dry blends, since such materials can be
not sufficiently homogeneous.
1.4 This document does not apply to PVC compounds and products which evolve other decomposition
products, in addition to hydrogen chloride, at elevated temperatures that can affect the conductivity of
water when they are absorbed into it. In this case a method suitable for the determination of chloride
−
ion (Cl ) in the absorbing solution shall be used (see ISO 182-4).
1.5 This document can also be applied to other plastics materials which can evolve hydrogen chloride
or other hydrogen halides when heated under the conditions prescribed by the relevant specifications,
or as agreed upon between the interested parties.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
1
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oSIST prEN ISO 182-3:2022
ISO/DIS 182-3:2022(E)
ISO 565, Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes
of openings
ISO 4793, Laboratory sintered (fritted) filters — Porosity grading, classification and designation
ISO 6353-2, Reagents for chemical analysis — Part 2: Specifications — First series
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
stability time
t
s
time, measured by reference to a predetermined change in the conductivity of absorbing demineralized
water, required for a certain amount of hydrogen chloride to be evolved when a prescribed mass of PVC
compound or product is maintained at an elevated temperature under the test conditions specified in
this document
4 Principle
A test portion of the PVC compound or product is maintained at an agreed temperature in a nitrogen gas
stream and the hydrogen chloride evolved is absorbed in a given amount of demineralized water. The
amount of hydrogen chloride evolved is determined in relation to the recorded change in conductivity
of the water.
5 Reagents
During the test, use only reagents of recognized analytical grade in accordance with ISO 6353-2.
5.1 Pure nitrogen, containing less than 6 ppm oxygen and less than 0,1 ppm carbon dioxide by
volume. The purity shall be such that when the gas is passed through demineralized water (see 5.2) for
1 h at a rate of (7,2 ± 0,1) l/h, the conductivity of the water remains unchanged.
The gas shall be dried by passing it through a suitable drying agent, and the flow-rate through the
dehydrochlorination cell adjusted by means of a needle valve and measured using a suitable flowmeter.
5.2 Demineralized water, with a conductivity not higher than 5 µS/cm.
6 Apparatus
The general arrangement of the apparatus is shown in Figure 1.
6.1 Dehydrochlorination cells.
6.1.1 Cell A (re-usable), with shape and dimensions as shown in Figure 2.
A recommended procedure for cleaning the cell is given in Annex A.
6.1.2 Cell B (disposable), with shape and dimensions as shown in Figure 3.
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oSIST prEN ISO 182-3:2022
ISO/DIS 182-3:2022(E)
NOTE Other types of cell can be employed if it has been proved that the results obtained are equivalent to
those obtained with one of the cells described in 6.1.1 and 6.1.2.
6.2 Test portion holder, for use with cell A. The test portion is supported on a porous sintered-glass
disc grade P 100 specified in ISO 4793, 10 mm in diameter.
To prevent blocking of the porous disc, it is advisable to place a thin, soft layer of glass wool between it
and the test portion.
A recommended procedure for cleaning the disc support is given in Annex A.
Key
1 N cylinder with pure nitrogen 6 Thermometer (scale division 0,1 °C)
2
2 flowmeter 7 Magnetic stirrer (in case using heating oil bath)
3 heating bath/heating block including temperature 8 Absorbing solution
controller (scale division 0,1°C)
4 PVC test portion 9 Measuring electrode(s)
5 dehydrochlorination cell (details see Figure 2 and 3) 10 Conductance meter
Figure 1 — General arrangement of apparatus
3
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oSIST prEN ISO 182-3:2022
ISO/DIS 182-3:2022(E)
Dimensions in millimetres
Key
1 spurs
2 17 coils
3 sintered-glass disc, 10 mm d
...
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